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std::regex_traits::regex_traits

De cppreference.com
 
 
Biblioteca de expresiones regulares
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(C++11)
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(C++11)
Gramática de las expresiones regulares
 
 
regex_traits();
Default-construye el objeto std::regex_traits, incluyendo default-construir el miembro std::locale privado o cualquier otro estado interno según sea necesario .
Original:
Default-constructs the std::regex_traits object, including default-constructing the private std::locale member or any other internal state as necessary.
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Ejemplo

#include <iostream>
#include <regex>

int main()
{
    std::locale::global(std::locale("en_US.utf8"));
    std::regex_traits<char> r1;
    std::regex_traits<wchar_t> r2;
    std::cout << "The regex locale is " << r1.getloc().name() << '\n';
}

Salida:

The regex locale is en_US.utf8